1,1

Contains almost all primes.

Table of n, a(n) for n=1..54.

177 is in the sequence because its digits {1,7,7} may be grouped so that 1*7=7.

632 is in the sequence because its digits {6,3,2} may be grouped so that 2*3=6.

Sequence in context: A033283 A044851 A276769 * A067042 A078273 A065571

Adjacent sequences: A160858 A160859 A160860 * A160862 A160863 A160864

nonn,base,easy

Claudio Meller, May 29 2009

approved